I'm trying to cut some fat without losing much muscle. My diet is fairly clean. I've dropped about 15lbs in the past month, which I'm pretty happy with. My main concern is that my legs are one of my weakest body parts although in the past year i have brought them up considerably, but im fearful that the cardio I'm doing is going to kill the muscle mass in my legs. I'm doing about 45 min cardio on the treadmill and the same in the elliptical 4 to 5 times a week. Any thoughts?